Wood-preserving compound



l'UTED FOR MISSING 9GP JOSEPH w. PUTNAMOF ew ORLEANS, LOUISIANA,

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srncmrce'rrorr forming part of Letters Patent No. 405,907, dated June 25, 1889.

Application and May 13, 1889. Serial No. 310,529. (No specimens.)

Toall whom, it may concern: I

Be it known that I, JOSEPH W. PUTNAM, a

- citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented new and useful Improvements in Compounds for Preserving Timber, of which the tollowing is a specifica tion.

The object of my invention is to provide an improved compound for the purpose of pre- 5 serving timber from decayand for protecting it from the attacks of land and marine animals.

My invention consists in a wood-preserving compound containing rosin, petroleum, and

- pine-wood oil, (or oil extracted from resinous timber by destructive distillation,) and may also contain creosote or coal-tar.

Heretofore the oils employed in the preservation of timber have been used in a'very volatile condition, and are liable to be dissipated and their preservative qualities lost under the action of air, heat, and moisture.

While the oils remain in the timber they are a protection against decay and the ravages of insects; but as the oils usually employed are to a certain extent soluble in water they are liable .to'be washed out or removed by the action of water on the wood. Bythe addition 'of rosin to the oils usually employed they are rendered more tenacious and their staying qualities greatly increased, so that wood saturated with a suitable mixture of resin and oil is made more durable and better able to resist the attacks'of insects and marine animals and the deteriorating influences of air and moisture. According to my present invention I prefer to employ a mixture of rosin,-

petroleum, (mineral 'oil,) crude or refined, or its products, andpiue-wood oil; but I may also use creosote-oil or any oil from the distillation of coahtar.

In preparing the compound the rosin and oils are mingled by natural solution or by heat,- either natural'or artificial, according to climate, ordinary summer temperature being suflicient to enable the. oil or oils to dissolve the ros'in. 'When artificial heat is employed, the temperature may be increased "to 200 Fahrenheit, though the rosin and 'oil will readily combine at a lower temperature Search No particular proportions of the rosin and oils need be observed in preparing the compound, except that. the/quantity of oil or oils should be sufliciently in excess of the rosin to facilitate its thorough solution, the object being to produce a compound possessing the preservative and protective qualities of the oils, and which can be forced into and through the timber vhile'hot as readily as the oils, and which shall when cool and at ordinary summer temperatures remain too thick to readily flow o'ut,'and also become comparatively insoluble in water, either salt or fresh.

The compoundmay be applied tothe timber in any suitable or well-known way.

I would have it understood that I do not herein claim' a Wood preserving compound containing rosin; petroleum, and creosote-oil, as such is described and claimed in an appli cation filed by me February 21, 1889, Serial N 0. 360,747; neither do I'herein claim a compound containing rosin, creosote, and pine-' wood oil, as such is claimed in another application filed by me of evendate herewith. What I claim as my'invention 1s.

A wood-preserving compound"- containing rosin, petrolcmn, and pine-wood, oil, substautially as described.

nature in presence of two witnesses.

In testimony whereof I have affixed my sig- JOSEPH W. PUTNAM.

\Vitnesses:

GEo: W; REA, p JAMES A. RUTHERFORD. 

